Diego is going to the vet tomorrow evening at 6:30. I want him to have a full physical and see if there is anything wrong with him. I've tried feliway, diffuser and spray and a herbal cat calm spray remedy and a cat calm drop in their water. To no avail. He stalks and attacks Cali and she's got more wounds from him. I've had it, it must stop! I can't be there all the time with my water squirt bottle to distract him. Maybe some kitty "prozac" is in order.